In geometry, a translation is the shifting of a figure from one place to another without rotating, reflecting or changing its size. This is done by moving the vertices of the figure the prescribed number of spaces on a coordinate plane and then drawing the new figure.
These PFDs are designed to keep the wearer in a vertical position, but it is the wearersâ responsibility to maneuver themselves into a face-up position. Type III PFDs will keep unconscious wearers face-up just as well as a Type II vest.
The EVD is calibrated at the level of the tragus. Depending on the indication for CSF drainage, the height of the EVD can be kept at 10-20 cm above tragus. The drain should be kept open at the desired height so as to allow the CSF to escape if the ICP rises above that level.